The document discusses different types of hair loss including alopecia, androgenetic alopecia in men and women, traction alopecia, and their causes and treatments. It describes the hair growth cycle and tests used to evaluate hair loss. Common treatments for androgenetic alopecia include minoxidil, finasteride, and spironolactone depending on the patient's sex and symptoms. Traction alopecia is caused by hairstyles that pull on hair and can be prevented by less tight styling.

1. Alopecia Nastaran tavakoli Guilan University of Medical sciences

2. Anatomy of Hair

6. Hair Growth Cycle

7. Hair pull test

8. Trichogram

9. Anagen Catagen Telogen

11. Norwood-Hamilton Classification